TITLE:
Delftia lacustris SW-1, a Strain with Degradation Potential for Aniline in Weakly Acidic Industrial Wastewater
AUTHORS:
Jiahui Hao, Qiwen Han, Jing Guo, Kexin Wang, Ruixian Yuan, Qingping Hu, Jianguo Xu
KEYWORDS:
Aniline Degradation, Weak-Acid Wastewater, Co-Metabolism, Degradation Pathway
JOURNAL NAME:
Journal of Environmental Protection,
Vol.16 No.11,
November
21,
2025
ABSTRACT: In this study, a weak acid-resistant strain SW-1 was isolated from the aeration tank of the sewage treatment plant at Shanxi Normal University and identified as Delftia lacustris. It exhibited a high capability for degrading aniline up to 1500 mg/L. Under optimal conditions (pH 6.0, 30˚C), 1000 mg/L of aniline was nearly completely degraded within 32 hours. When utilizing sodium acetate, glucose, and folic acid as co-metabolic carbon and nitrogen sources, the strain demonstrated enhanced degradation efficiency for aniline. RT-qPCR analysis indicated that the strain degrades aniline via the meta-cleavage pathway. This finding could provide a theoretical basis and practical material for the treatment of aniline pollution. The adaptability of strain SW-1 to diverse cultivation conditions signifies its potential for degrading aniline in weak-acid industrial wastewater.